I only have 4 so far, but my favorite would have to be New Years on the Voyager. We had such a marvelous time being together and everyone on the ship was there to have a good time. The ports weren't memorable (western Caribbean) but who cared?
Second would be our trip this past Dec to French Polynesia (PEARLS) with the likes of Russ and Debbie and the rest of the gang. A highlight was meeting up with the folks on LAMB and getting to chat with everyone. Between snorkeling, good food and buying pearls, what could be bad?